These sticky plum meatball lettuce cups are a delicious and healthy appetizer or main dish. The meatballs are made with a combination of ground pork and beef, flavored with garlic, ginger, and soy sauce. They are then coated in a sweet and tangy plum sauce, which adds a sticky and flavorful glaze. The lettuce cups provide a refreshing and crunchy base for the meatballs, and can be filled with additional toppings like shredded carrots and chopped peanuts for added texture and flavor.